Piston-ring-fitting apparatus



June 9, 1925.l 1,540,765

' CLE. DANIELS PISTON RING FITTING APPARATUS Filed Feb. 14. 1924 s 4sheen-sheet 1 fi@ i Si@ Q I l ,n n Q N Q I,

:o ix l June -9, 1925A C. E. DANIELS PISTON RING FITTING APPARATUS Filed Feb. 14. 1924 3 Sheets-Sheet 2 June 9, 1925.

C. E'. DANIELS PISTON RING FITTING APPARATUS Filed Feb. 14. 1.924

3 Sheets-Sheet 5 K l1/vu *voz CharlesEDaniels,

. Fitting VApparatus,

Patented June 9, 11925.

CHARLES n. nAmnLs, or A'rcmsoN, xANsAs.

PISTQN-RINFITTING APPARATUS.

I Application led February 14, y1924.. Serial No. 692,773.

To all Iwlw/om z't may concern:

Be it known that I, CHARins E. DAmnLs, citizen of the United States', residing at Atchison, in the county of Atchison and State of Kansas, have invented certain new and useful Improvements in Piston-Ringof which the following is a specification.

This invention relates to an improvement in apparatus for dressing or milling the ends of piston rings which are used on the pistons of gas engines, steam engines, V-compressors, etc.

Heretofore, the practice has been to individually tile the ends of the rings and individually fit said rings to the piston.' This, of course, is a very slow and tedious operation, and furthermore, there is no certainty that all of the rings of a given piston will be fitted in a uniform manner.

One of the principal objects of my invention is to provide an apparatus whereby the ends of the piston rings may be milled a predetermined amount and thereby insure a. uniform fitting of all ofthe rings for the particular piston. I

Another object of the invention is to provide an apparatus for milling the ends of piston rings of diiierent sizes and to insure the accurate milling of the ends of the rings regardless of the` size of ring be- 4in drawings, in which ing milled.

Another object of the invention isto provide an apparatus of the character described in which ends of the piston rings may be milled expeditiously and with a minimum amount of labor. With the above and other objects-in view which will more readily appear as the nature of the invention is better understood,

the same consists in the novel construction,

combination yand arrangement of parts hereinafter more fully described, illustrated and. claimed. L

Preferred and practical embodiments of the invention are shown in the igure 1 is atop plan view of a milling apparatusv constructed in accordance with my invention.

Figure 2 is a bottom plan view thereof, the base plate being removed. L Figure 3 is a detail sectional view taken on the line3-3of Figure 1.

accompanyi Figure 4 is a detail sectional view taken on the line 4-4 of Figure/1. i

Figure 5 is a side elevation showing a modifiedA form ofF milling tool.

Figure 6 is a horizontal' sectional view taken on the line 6-6 of Figure 5 and looking in the directionof the arrows, and

Figure 7 is a detail sectionall view taken on the line 7-7 of Figure 1.

Like reference numerals designate corresponding parts throughoutthe several iigures of the drawings.

In carrying out my invention, a base plate A which supports The table supports a plurality of radially movable clamping jaws C which are arranged about a circle for receiving therebetween a piston ring D. These jaws are moved inwardly oroutwardly simultaneously in radial directions through the medium of a camplate E which is actuated by a.

I provide a table B.

hand lever F. Also mounted on the table l B is a milling 4tool G which is operated by a hand crank H or other suitable means.

This milling tool G is positioned between the ends of the piston ring D. The hand lever F is `moved in a direction to force the clamping jaws C inwardly and thereby compress the piston ring D so that the ends of the latter wlll engage the opposite milling surfaces of the tool G. While the milling tool G is being4 operated, the hand lever F is moved so as to fur piston ring D, thus causing both -ends of the piston ring to be simultaneously milled. Carried by the table B is an adjustable stop I which cooperates with the handle F to limit the movement thereof in one direction and thereby predetermine the amount of compression of the piston ring D and consequently limit the amount .of metal which is milled 'from the ends ofsaid ring.

The form illustrated in Fi res 5 and 6 issubstantially the same as s own in IFigures 1 to 4 and 7, except that in this second form the milling tool J is` a reciprocatory tool whereas the tool G shown in Figures 1 to 4 is a rotary tool.

Referring specificallyy to the drawings, the base plate A carries a plurality of standards 5 for supporting the table B. The table B is circular in lan view and is formed `Vwith a plurality ofp inwardly extending radially disposed slots 6 for slidably receiving the ther compress the clamping jaws C. A band 7 is secured to the periphery of the table B for the purpose of closing theouter ends ofthe slots 6. The clamping jaws C are each formed with a depending rib 8 and a head 9 forming resultant longitudinal vgrooves 10-10 for sliding contact with the walls of the slotl with the stud to retain theI cam plate E thereon.

The inner end of each clamping jaw C is'recessed in its upper face to forma seat 17 for lreceiving the piston ring D. Furthermore, each clamping jaw carries an antifriction roller 18 which is located in the recess forming the seat 17, whereby the ring will contact with all of said rollers.

The cam plate Eis provided with thelaterally extending operating lever F for oscillating the cam plate E and thereby cause the clamping jaws C to be moved inwardly or outwardly simultaneously.

In order to support either of the milling tools G or J, I have Aprovided the table B with a pair of diametrlcally opposed standards 19 and 20 and thesestandards in turn support a pair of horizontally disposed gulde rods 21-21, said rods being disposed in the same plane and arranged in spaced relation to the table B and on. opposite sides of rthe center thereof. The milling tool G is fixed to a horizontal shaft 22 which is journaled in a carriage 23 having slidable engagement with the guide rods 2l. The tool G is disposed centrally between the guide rods 21 and is therefore arranged in a radial plane relative to the piston ring D. The tool G is in the nature of a disc and the opposite faces 24-24 of said disc are respectively roughened to form milling or cutting surfaces. The tool G extends into a groove 25 formed in the upper face of the table B thereby increasing the amount of working surface of the tool in the planecoutaining the ends. of the piston ring. The shaft 22 of the tool is extended beyond the base plate A and carries at its outer end the crank handle H.

In order to'predetermine the amount of compression of the ring D and thereby limit the amount of metal milled from the ends of the ring, I have provided the 'adjustable stop I. This stop includes abracket 26 which is adjustably mounted upon a track 27 concentric with the center of the cam plate E. The track 27 consists .of a rail 28, which is disposed in spaced relation to the band 7 through the medium of spacingstop I which is herein illustrated as a rod mounted for lengthwise movement through the medium of a micrometer adjusting means 33. The free end of the stop is adapted to be engaged by the operating lever F and thereby limit the movement of said lever in one direction.

Fixed to the table B and extending parallel with one yof the slots 6 thereof' is a scale 34- for the purpose of initially positioning the clamping jaws C to receive a kgiven sized piston ring. l j

The operating tool J which is shown in Figures 5 and 6 of \the drawings is a reciprocatory tool and in this instance comprises a le 35 which' is supported from a carriage 36 mounted for reciprocatory movements on the guide rods '21. The carriage 36 is reciprocated through the medium of a crank 37, link 38 and an operating crank arm 39. The crank 37 is carried by a shaft 40 which is journaled in brackets 41--41fixed to the` guide rods 21, and fixed to the shaft 40 is a fly-wheel 42.

The operation of my invention is as follows: The operating handle F of the cam plate E is first moved so as to positionF the clamping jaws C to receive a piston ring of a given size, the initial position of the jaws for a given sized ring being indicated by the scale 34. The piston ring D is then positioned on the seats 17 of the clamping jaws C with the ends of the ring arranged on opposite sides of either of the milling tools G or J. The tool G is then rotated or the tool J reciprocated, and simultaneously the operating handle F of the cam plate is moved towards the micrometer stop I. This move` ment of the hand lever F oscillates the cam plate E and causes the clamping jaws C to be moved inwardly thus compressing the ring and causing the ends of said ringI to bear' against the opposite faces of the tool. Movement of the operating lever F is continued in the same direction until its movement is limited by the stop I. A s soon as llO the Afirst ring has been satisfactorily fitted to a given piston, the stop I is retained in the adjusted position. Consequently, all of the other rings for the given piston will have their ends ground the same amount and, therefore, all ,of the rings for a given piston will be uniformly fitted.

Without further description it is thought that the features and advantages of the in.

vention will be readily apparent to those ,skilled in the art, and it will, of course, be

portion and minor details of construction may be resorted to without departing from the spirit of the invention and scope of the appended claims.

I claim: f j

1. In an apparatus for milling the ends of a piston ring, the combination of'a support for said ring, of a milling tool adapted to be located between the ends of the ring, and means for progressively compressing the ring up to a predetermined point whereby the ends thereof will be pressed against the millling" tool, and means for operating said too l 2. In an apparatus for milling the ends of a piston ring, the combination with a support for said ring, of a milling tool located betweenthe ends of the ring, adjustable means for compressing the ring up to a predetermined point 'whereby the ends thereof will engage the milling tool, and means for operating said tool.

3. In an apparatus for milling the ends of a piston ring, the combination with a support for said ring, of a milling tool located between the ends of the ring, means for compressing the ,ring whereby the ends thereof will engage the milling tool, a stop to limit the amount of compression of said ring, and means for operating said tool.

4. In an apparatus for milling the ends of a piston ring, the combination with a support for said ring, of a milling tool located between the ends ofthe ring, means for compressing the ring whereby the ends thereof-will engage the milling tool, an adjustable stop to predetermine the amount of compression of said ring, and means for operating said tool.

5. In an apparatus for milling the ends of a piston ring, the combination with a support for said ring, of amilling' tool located between the ends of the ring, means including an operating lever for compressingvthe ring whereby the ends thereof will engage the milling tool, and means for operating said tool.

LG. In anapparatus 'for milling the ends o support for said ring, of a milling tool located between the ends of the ring, means including an operating lever for com ressing the ring whereby the ends thereo will engage the milling tool, and a stop cooperating with said lever to limit the amount of lcompression of said ring, and means for operating said tool.

7. In an apparatus for millingthe ends of a piston ring, the combination with a support for said ring, of a milling tool locatedY between the ends of the ring, means including a lever for compressing the ring whereby the ends thereof will engage the mill tool, and an adjustable stop cooperating wlili saidlever to predetermine the amount of a'piston ring, the combination. with ay of a piston ring, table vformed with compression of said ring, erating said tool.

8 In an apparatus for milling the ends of a piston rin the combination with a table, of aplura ity of clamping jaws movable radially relative to said table and adapted to receive a piston ring therebetween, a milling tool supported on the table and disposed intermediate the ends 'of the ring, means for simultaneously moving the clamping jaws inwardly to compress'the ring whereby the ends thereof will engage said tool, and means for operating said tool.

9. In an apparatus for milling the ends of a piston ring, the combination with a table, of a plurality of clamping jaws movable radially relative to said table and adapted to receive 'a piston ring therebetween, a milling tool supported on the table and disposed intermediate the ends of the ring, means for simultaneously moving the clamping jaws inwardly to compress the ring whereby the ends thereof will engage sail tool, means for operating said tool, an movements of said clamping jaws.

10. In an apparatus' for milling the ends of a piston ring, the combination with a table, of a plurality of clamping jaws movable radially relative to said table and adapted to receive a piston ring therebeand means for optween, Ja milling tool supported on the table s and means for operating said milling the ends means to predetermine the inward the combination with av the amount of compression receiving a piston ring therebetween, a cam plate mounted for oscillatory movements below said base and formed with a plurality of cam slots, shoes respectively connected` to the clamping jaws and engageablewith the cam slots, a milling tool supported on the table and disposedintermediate the-ends of the ring, an operating lever secured to the cam plate for oscillating the latter to move the clamping jaws inwardly to compress the ring whereb the ends thereof will engage said tool, andy said tool.

12. In an apparatus for milling the ends the combination with a a plurality of radially extending slots, a 'plurality of clamping jaws respectively mounted in said slots for receiving a piston ring therebetween, a c am means for operating plate mounted for oscillatory movements belowsaid base and formed with a plurality of cam slots, shoes respectively connected to the clamping jaws and engageable with the cam slots, a milling tool supported on the table and i disposed intermediatethe ends of the ring, an operating lever secured j to the cam plate for oscillating the latter extending slots, a plurality of clamping jaws respectively mounted in said slots and formed with seats for receiving a piston ring, said jaws being respectively provided with anti-friction rollers for cooperation with said piston ring, a cam plate mounted for oscillatory movements below said base and formed with. a plurality of cam slots, shoes respectively connected to the clamping jaws and engageable with the cam slots, a milling tool supported onl the table and disposed intermediate the ends of the ring, an operating lever secured to the cam plate for oscillating the latter to move the, clamping jaws inwardly to compress the ring whereby the ends thereof will engage said tool, and means for operating said tool.

14. In an apparatus of a piston ring, the combination with a support for said ring, of a pair of diametrically opposed standards carried by said support, a pair of horizontally disposed guide rods xed to said standards, a carriage supported on said guide rods, a milling tool supported by said carriage and disposed between the ends of the ring, and means for operating said tool.

15. In an apparatus for milling the ends of a piston ring, the combination with a supportl for said ring, of a pair of diametricall-y opposed standards carried by said support, a pair of horizontally disposed guide rods fixed to said standards, a carriage supported on said guide rods, a milling tool suppo-rted by said carriage and disposed between the ends of the ring, means for compressing the ring whereby the ends thereof will engage the milling tool, and means for operating said tool.

'In testimony whereof I hereunto alix my signature in the presence of two witnesses.

CHARLES E. DANIELS.

for milling the ends 4 

